Today, there is an exercise known as the “Irish Lumberjack,” which builds the arm and core strength needed to chop down trees. Sure, you probably won’t have to hew gargantuan trees anytime soon, but great arms, abs and balance always come in handy. Here’s how the exercise works: Execute a few sets of one-armed dumbbell rows while balancing on one leg with the knee slightly bent. Be aware of your posture and try to keep your back from rounding. For the original version including any supplementary images or video, visit http://www.cnn.com/2014/03/17/health/upwave-st-patricks-day-workout/index.html